Hoisting cage



Sept. 4, 1923. J

v. T. BARKLEY HOISTING CAGE 4 SheetsSheet 1 Filed Sept. 15 1920 V. T. BARKLEY HOISTING CAGE Sept 4, 1923. 1,467,223

Filed Sept. 15 1920 4 Sheets-Sheet 2 FIG. 2

Sept 4,1923.

1,467.223 V. T. BARKLEY HOISTING CAGE Filed Sept. 15 1920 4 Sheets-Sheet 5 Sept. 4, 1923.

V. T. BARKLEY HOISTING CAGE 4 Sheets-Sheet: 4

Filed Sept. 15 1920 lNVEN TOR Patented Sept. 4, 1923.

* entree} stares Fri-ct,"

VERNOR T. BARKLEY, 0F -PII.TSBU.EGH,' PENNSYLVANIA.

norsrme o ten); l

' 7 Application filed September To aZZ whom it may concern:

Be it known that I, VERNOR T. BARKLEY, a citizen of the'United States, and resident ofPittsburgh, in the 'count'y ofAllegheny and'Sta'te of Pennsylvania, have invented a new and useful Improvement in Hoisting Cages; and I do hereby declare the following to be a full, clear; and exact descrip "The method her tofore employed forhoisting coal from a shaft mine equippedwith. solid cars consists in dumping'the coal-from the cars the shaft bottom; commonly by means-or" power-drivenapparatus, into a hopper from'whichlthe coal passes into skips or buckets and is hoisted; I neccssaryto excavate a pit below the coal seam, and this pit, which is about s'iX-tyfeet deep, naturally "becomes'a sump or drain, since it is'tat the lowest part of the mine,

and a pumping station must therefore be provided. I his method is not only e xpen.- sive buthaspracticalob ections such as the breakage of soft lump coal.

the dumping of the coal at the bottom of the shaft: to deliver the coal from the cars di rectly to the receivinghopper or chut'e in the tipp'lc. with little or no breakage, even if the hoist should overind; to increase he hoisting speed by doing away with, the excessive distance of slow hoisting that is nonnecessary to turn the present. ships and cages to dumping position and the similar loss of time in returning the skip or cage to the shaft bottom. and to provide a cageiIi which'the entire; weight is always effective to balance the other cage in the shaft.

XFith these and other objects 'in'view my invention provides, in combination, a hoisting cage and gravity rotary dump mount- 15, 192p. Serial 1%. 410,536.

edf' 'in thec'age on frictionless bearings, the

cage and dump being of simple andru'gged construction, complete and positively oon trolled; Tw m eeem employed-together,

one rising'with a" loaded car while the" other T is dcscending with anempty car "and each cageoperate to hoist a' loaded car carriedon the dump andto rotate the dump by gravity while the'car isbeing hoisted and 'beforethe cage that' carries the empty car reaches the bottom of the shaft, so that before the cages reachthe end of their travel they areboth empty and inequilib'rium. @Whilethe dump s rotatingwith the loaded car, a chute which is also carried by the 'cage'is lowered by ir1eansofflshitab-le' guides into proper positlO'Il to rece ve'the load from thecar and deliver it tothe receiving chute in the tipple',

and the chute is againraised by the guides 7 while the cage descending the shaft. As the cage descends in the shaft; the dump is ;rotated"by gravity in the reverse direction j to bring the empty to an'upright posie constructed in accordance with my invention Inthejaccompanyingdrawings, 'Figi 1 is 1 a "side Gl'GVZLtlOl'litl' View of a, hoistlng cage Thls makes 1t Fig. Q is a' side elevational view-similar to I .Fig. 1', show ng the cage in the duinping'pm sitionyFi'g. 3 is an end View -of the same structure {Fig 4 isa plan view'with parts in'sectio'n onithe, line 4-4, Fig.1; Fig. 5 is I j a fragmentary elevat onal view showing the My present lIlVGlltlOD aims to'elnninatej horn-releasin trig 'er mechanism at-the bottom' of the shaftand Fig. 6 1s an enlar ed elevational view of one ofthe rear horns and its operating mechanism.

bars" 2 and'carrying vertical angle bars 3 which form guides for engaging the usual vertical timbers {of theini'nep The lower ends 10f the ,o uidesfl are connected by a channel p'lateti and the top of thecage also provided with the usual hoistingrig-v ging and safety attachments, the detailsof which form no part of my invention.

The side. plates 1 carry bearings 6 1n which i 'supported a fixed shaft that is somewhat to the left of the center line of the guides 3 as shown in Figs. 1 and 2, and carries a rotatable car dump 8 resting upon bearings 9 mounted on the shaft '7. The dump 8 consists of a suitable frame-work supported on the bearings 9 and carries a pair of tracks composed of angle bars 10 secured to the upper edges of the side plates 11 of the dump. A pair of front horns l2, and a pair of rear horns 13 are also carried by the dump, these horns being adapted to grip and hold the wheels of a car 1 The dump 8. swings between the fixed side plates 2 on which are secured the guides 3. The center of gravity of the dump 8 is so disposed that the dump is slightly unbalanced to the left of the supporting shaft 6 while carrying an empty car, so that. the cross bar 2 at the left of Fig. 1 holds the car support level at this time. When the dump carries a loaded car, the center of gravity of the dump and all rotating parts is on the right of the shaft 6, so that the dump tends to rotate by gravity to the right.

The side plates 1 form. a chamber which communicates with a downwardly extending fixed chute 19, the lower end of which opens into a movable tapered chute 20 that is pivo'tally secured at one end to a. shaft 21 which extends between the guides 3 and is received in bearings 22 on the channel plate 5. The under side of the chute 20 carries bearings 23. in which is mounted a shaft 24 to the ends of which are rigidly secured two castings 25, each of which has a short extension 26 received between the rounded ends of two pins 29 which extend through openings in abracket 28 and carry two compression springs 27, washers 30 and nuts 31. The chute 20, being tapered, requires a relatively small receiving hopper.

The upper ends of the castings 25 are connected by means of a horizontal shaft 32, the ends of which carry rollers 33 which 7 are keyed to the shaft 32 and are adapted to enter between fixed guides 34; that are attached to the head frame, and are adjacent to the receiving hopper of thetipple. Since the chute 2O tapers downwardly, the hopper need not be as wide as the cars carried by the dump. Two hooks or latches 36 having lugs 36 are carried loosely by the horizontal shaft 32, these hooks being adapted to engage pins 37 carried by the guides and by brackets 38, thereby holding the movable chute 20 in the position sho-wn'in Fig. 1. The shaft 32 also carries loosely two rollers 18 for the purpose of rotating the dump S in the manner described below.

Two chains 39 are attached to the upper ends of the castings 25 and are connected at their upper ends to bell crank levers 40 which are carried by a shaft43 underneath the car dump 8' and are connected by means of links ll to locking pins 42 that are norjection 55 mally forced outward by means of a spring as (Fig. 4-) which is secured to a bracket 45 on the dump frame and to a lug 43 on the shaft 43. It will be evident that when the rollers 33 enter the fixed guides 34 the upward movement of the cage will cause the chute 20 to be rocked downward and will also tighten the chains 39 and thus rock the bell crank levers 40 to withdraw the locking pins 42, leaving the car dump 8 free to rotate in a clockwise direction, Fig. 1, which it then does, being unbalanced to the right of the shaft 7 by the coal in the car, as stated above, until'it reaches its dumping position as shown in Fig. 2. A positive stop 2 is secured to the under side of the side plates 1' for the purpose of limiting the rotation of the dump, I

The two horns 12 and 13 at each side of the car dump are carried by a shaft d6 that is slidably mounted in bearings 47. A buffer spring adsurrounds the shaft 46 and crnnpressed between one of the bearings .47 and a collar 46 on the shaft e6. The movement of the shaft 46 to the right, as shown in Fig. 1, is limited by means of a collar :30. The loaded car runs upon the car support from the right, Fig. 1, and is stoppml by engagement of its front wheels with the front horns the shock being cushioned by the springs 48. The rear horns 13 are opened outward at this time to permit the wheels of tie car to pass between them. hen the front wheels of the car strike the front horns 12, one of the wheels LQPI'GSSQS a trigger 4-9 which causes the rear horns 13 to close and grip the rear wheels of the car. After the car has been dumped and the has descended to the bottom of the shaft, both sets of horns are opened outwardly to release the, wheels and permit theempty car to be removed. After the rear wheels of the car pass the front horns, the front horns are closed to receive the front wheels of the next loaded car. These successive movements of the horns will now be described, with reference particularly to Figs. 1, at, 5, and 6.

Each of the horns 12 and 13 has a prowhich extends downward beyond 4-6. Both of he projections 55 front horns are connected by means of links 56 to the ends of a lever 57 which rocks on a pin 58 that also carries a lever 59 to which is connccud a rod 60 that extends nearly to the end of the car dump 8 and is there connected to a bell crank lever 61 which is secured to a rock shaft 62' and has an outwardly projecting arm 63. As the cage descends in the mine shaft the lever arm 63, as shown in Fig. 1. is in position to engage a stop-member 6% near the bottom of the shaft. The stop member 64 is carried at the end of a red the shaft from the which islmounted sl-idably in bearingsGG on any convenient fixed support,*a spring 67 being provided, tonormally forcethe rod 65 and stop-member 64: into the path of the lever arm 63; The end of the rod 65 opposite .to the stop-member 64 is connected by means of a link 68 to a lever69 on a.

rock shaft 70, Fig. 5, which carries a trigger 71 that extends above a track- Z2 so as to be depressed by a car rolling over-the track,- and the track 72*isin line'with' the track 10 on the car siuoport 8 when the cage is at the bottom of the shaft. J p

The ,rear horns 13 are provided with somewhatdifferent operating connections.

Each of these horns, as best shownin Fig.-

6, is provided'with-a recess 75' adjacent to the shaft 46 and a key miscarried by the shaft afian'd extends to there cess 75. This arrangement provides a lost-motion con-" nection between the horn 13 and its shaft 46, so that when the horn is rocked out ward to release the car wheel and the shaft is'afterward rocked ba'ck to its starting position the horn '13 can remain in its outward or open position, "The downward extending progect1on'55 from each of the rear horns 1'3 is attached loosely to a sliding loosely. through brackets" 82, as show'n in Fig. 4, and their front ends are pivotally secured to lugs 23% carried by a rock shaft 83 that also carries the triggers?) which," as stated above, is adapted to be depressed by one of the front wheels of the loadedcar as itrolls' upon the dump. A spring 8% rocks the shaft -83ba'ck to its starting posiwheel and thus returns the rods 81 into position to lock the bars 77 when the rear horns are again operated. r

lVhen the cage descends, the lever 68 engages the stop member 64 and is rotated to the dotted line position shown in Fig. 5.

whereby acting through; the lever '61 and the rod 60 to rotate the pin 58 against the pull of the'spring 7 3," thus pulling upon the links 56, rocking tbe shafts l6 and opening the front and rear horns 12 and 13. This releases the wheels of theempity car, and the ear is pushed from the cage by the next leaded car whic-his to be hoisted. The out ward rocking movement of 'the shafts 46 7:2, one of its front *wheels depresses the trigger 7'1, therebywithdrawing the-stop member 64: from the-lever 63 and allowin D the spring 73' toreturn the' front horns 12 to. their upright'or-operative position; This -movement of the front horns is accompanied by a rockingof the shafts 46, which, how-. :'ever, does not cause the rearhorns 13 to close, because of the lost-motion connection between the rearrhorns and the shafts 4:6.

Whentheloaded car rolls into'thecage and its front wheels arel-stoppedzby .the front horns l2, oneiof the front-wheels, at the same time, depresses the trigger i), thereby rocking the :shaft 83 and'thuswithdrawing the rods 81 from the bars Wand permitting 5 the springs 79 to close the rear horns-'13 and-grip 'therear wheels-of the car. The horns remain in their closed'position while the eage'rises and'fallsiand when thecage' again reaches-the bottom of the shaft-the lever 63 again engages the stop-member 64 and the horns are again opened in the manner described above. I

In-order to brake and control the-rotary movement of the carv dump 7, I'provide a by means of a connecting rod 88 to a crank pin 89 carried between two crank members 90 that are. rlgully secured to the fixed shaft 7. A bypass pipe 91, controlled by a suit able valve 92, provides "communication :be-

pass maybe provided to allow the. odor "other fluid contained in "the cylinder 85 to return quickly while the car support is belng returned to i'ts'startlng position and a .195 suitable' reservoir should also be provide to replace leakage andfkeep the cylinder. full-of oil; r

tion when the trigger lQ-is released by the side platesl'at the-rear of the car during the dumping operation, Imay-provide a1 plate 93 which is vertically movable on a suitable support 9 l earri'ed at the upper end oftheniine shaft The plate 93' is adapted to be engaged andflifted byamem ber 95 carried by thewcage and this takes place in time'to prevent'coal from spilling from the rear of the cagewhile' the, car

is beingdumped.

A eounterwelght 96 under side of the cardump 'Z, in order .to'

insure that the dump willreturn to its up -f right position after the car has been dumped. V V The operation of my improved hoisting cage may be'best understood by reference to Figs. 1 and'a. Fig.1 shows the cage at the time when itis rising in themine shaft or pp e and has almost reached the to f -13) its upward movement." At this time the 90 'eylinder 85 which is'secured to thecar dump. by means of suitable trunnions 86 received in bearings 87 ,i as. shown in Figs. 3 and 4;' The piston of. the cylinder'85 is connected" cage is oppositeto the top of the stationary receiving hopper 35. The lugs 36 now enter between the stationary guides 34: and rock the latches 36 which are loose on the shaft 32, thus unloclringthe chute 20. The upward movement of the cage causes the rollers to enter between the guides 34-, and these rollers act through the shaft to exert a pull upon the chains 39 which rock the bell crank levers 40 on the shaft d3, thereby withdrawing the locking pins 42- and leaving the car dump 7 free to rotate. The car dump, being unbalanced to the right, Fig. 1, immediately begins to rotate.

" The dump continues to rotate by gravity until it, completes a rotation of about 135 and this takes place while the cage is still moving upward. chute 2O swings downward around its pivot 21 by reason of the engagement between the roller 33 and the fixed guides 34, and its lower end comes over the receiving hopper 35.

The coal falls from the car and down through the fixed chute 19 and the movable chute 20 into the stationary receiving hopyond its usual upper position without causing damage, and by this chute arrangement the coal may be delivered at any point between the dumping and the overwind position of the cage without the chute leaving the receiving hopper. The chute will rest upon the hopper at any point between the full line position and the dotted line position A shown on Fig. 2. This permits the head frame to be fully braced without allowing space for the chute in case of over- .wind.

As the car dump rotates to dump the load. its movement is cushioned and regulated by the fluid-filled braking cylinder 35, the piston of the cylinder being moved by reason of its eccentric connection to the shaft 6 through the stationary crank 90. The speed with which the oil or other fluid passes from one side of the piston to the other. through the pipe 91, is'readily controlled by means of the valve 92.;

The parts are so proportioned that the chute is lowered toits discharging position before the car rotates far enough to discharge its load, while the car reaches its At the same time, the,

limit of rotation or final dumping position,. .as shown in Fig. 2, at substantially the same time that the cage completes its upward movement Almost immediately, therefore, the cage is ready to belowered again. As the cage begins to drop, the lower end of the chute 20,- engaging the stationary receiving hopper 35, is raised to bring the rollers 33 down to the curved portion of the guides 34, after which the guides cause the rollers 18 to raise the chute until the latches 36 engage the pins 37 and thus lock the chute in enter the guides the loose rollers Ben the shaft 32 carried by the chute 20,, engage the girders of the dumpunder the rails 10 and begin torotatc the dump back to its upright position, the shock of starting the dump being cushioned by the springs 27. The relation of the parts at this time is shown in dotted lines at B, Fig. 2, and the rollers 18 continue to push the dump around, while the cage is descending in the shaft, until the chute 20 is locked, at which time the center of gravity of the dump has crossed the shaft 7, when the dump comes upright by its own weight. As the dump is thus swinging back to upright position, the locking pins 42 ride on the curvedbottom of the chute 19', and are forced out by the spring 44 to lock the dump as soon as the dump is upright. It will be observed that the locking pins move parallel with the rails 10 and lie in the plane of these rails.

Then the cage reaches the bottom of the.

shaft the horns are openedin the manner described above and the empty car is free to be shifted from the cage and replaced by a loaded car, whereupon thehorns close alltomatically, as above described, and the cage is ready to be hoisted.

It will be observed that the time required to dump the load is reduced to a minimum, because the car support is rotating while the cage is rising and finishes its dumping movement practically as soon as the upward movement of the cage is finished.

The cage described above operates to hoist the loaded car, discharge its contents and return the empty car to an upright position without imparting any shock to the hoisting rope, head frame or tipple, or to the cage itself. This renders the cage well adapted for electric and automatic hoisting. which is not the case with the hoisting devices heretofore employed for shaft mines having closed cars. A further advantage is that the coal can be discharged anywhere within the limits of the dumping and full overwind positions of the cage, and the discharge chute will always rest upon the re ing hopper when the chute reaches its'horizon-tal position, with no shock or slamming eflect. Also thechutehasa positive lock, since almost the entire weight of the hooks or latches 36 is on the right of the center of moments acting on the chute. "The latches cantherefore be opened only by positive rotation of thelatches. 1-

entire weight is always suspended from the hoistingrope, with no supportfrom outside the head frame, and. is. thus effective at all shock while caging cars at the bottoniof the shaft, and by the positive governor propiston acting in thefluid filled times to'balance the other cage in the same shaft. This eliminates the excessive starting load imposed-.on the hoist motor in accelerating the cage-from the shaftbottom when. overturning skipsand the present guide-controlledtilting cages are used. The cages are therefore always in balance, whether loaded vor empty, and the empty cage at its delivering'position loses no part of its weight as 'a counterbalanceto the loaded cage at the bottom of the shaft.

' The operation of the dump is improved by the bufier springs 48 which absorb-the vided by the cylinder. v 1

The dump carried by the present cage is the first, so faras I am aware, that dis penses witlrthe-use of dumping guides and is able to rotate by gravity far enough to dump a closed car, which requires that the dump be rotated through an angle of at least 125 degrees. 1 s

vwithout,departing from -my invention and I therefore desire that 'no limitations be imposed upon my invention except such as are,

indicated in the appended claims.

I claim, as my invention:

movable car support, a 'pivotally movable d ischarge, chute,vand means operable during the upward movement of the cage for simultaneously rotating the. saidcar support in one direction and for-,moving. the said chute to its operative position by pivotal.

movable car support, a chuteca-rried by the said. cage and pivotally movable thereon from ara'ised position to a dischargingposition, alat'ch for positively locking the said dropping and breakage of the spect to j the Another advantage of'this cage is that its chute in its raised position andmeans'for releasing the said latch, and meansforsimultaneously rotating the said. car support in 'one direction and for moving thesaid' chute to its operative. position by pivotal movement in the-opposite direction with re ing. position during apart .of the upward movementof the cage, and means for-lowerrotary movement of said car I support. r j w I v .3...A hoisting cage comprisinga'fra-me, a

car dump carried by said .fr'ame,a chutevqpivotally secured to said frame and movable independently ofsaid dump, means for hold- .ingthe said: chute raised out of its operatingthe said chute to its load-discharging position duringthe further upward move 7 1118111. of the cage'.

7 4:. A hoisting cage comprising a.-frame,';a

shaft carried thereby, a. car 'supportmdimted .on thesaid. shaft, achute havingone end pivotally secured-to the said} frame below the said. carsupport, "means for. holding. the saidchute raise-d outf of its operative position, and means operable during thev upward'movement of the cage to lower the saidchute to its load-discharging position,

and to simultaneously give thesaid support an initial rotation, thereby displacing the center of gravity of the said support, and" its. load, the said support-being thereafter rotated further by gravity, to fdump the v 5. A hoisting cage comprising a fc ar support, atrack'mounted thereon, two' shafts slidably disposed beside-the said track, a

front wheels of the car and ,thercbyto'stopthe inoveinent of the .car. running on the,

:pair of hornsrigidlyfsecured to thefsaid 4 shafts and adapted to grip'an'd hold the said support, a buffer spring surrounding leach oflthe said shaftsJfor cushioning the It is to be understoodthat the details of" shock of engagement betweenthe said wheels horns also mounted-on the saidashafts and.

and the said hornsfand. a second pair of 7 adapted. tog-rip and hold-the rear wheels port, track-scarried by the said. support,a

- j pair ofhornsadapted to grip andhold the 1. A hoisting cage comprising a rotatably front wheels of the carfanda second pair "of horns adapted toflgrip and hold the rear wheels. of the car, means operable. during the downward movement of 'the cage for moving all of the. said horns to release the wheels of the car, ineansoperable by-thei car leaving the said support for bringing the said front.,l1'orns into'operative position,

ing tion.

- 7'. A hoisting cage comprising a c ar support, means for rotating the saidsupport by gravity to ,dump' car andmeans auto;- 1 1 I :matieally operable during the rotation of said car support for regulating the speed of rotation of the said support.

- 8. A hoisting cag comprising a car support, means for rotatably moving the said support to dump thecar, and means for regulating the speed of rotation of the said support, the said regulating means comprising a fluid-i lled cylinder carried by the said support, a fixed shaft, and a fixed crank carried by the said shaft and connected to the piston of the said cylinder.

9. A hoisting cage comprising a frame, a

fixed shaft carried bv the said frame a car support mounted on the said shaft, tracks carried on the said si'ipport, a set of horns also carriedb the said support and adapted to grip and hold the Wheels of th car, a fixed-crank carried by the said shaft, a fluidfilled cylinder carried by the said support and having'its-piston connected to the said crank, a chute pivotally attached to the said -frame below the said car support, and a member connecting the saidcar support and the said chute.

' 10. A hoisting cage comprising a car dump rotatably'movable'by gravity to dump a car, tracks carried by the said dump and a locking member for holding the said dump against rotation for loading, the saidlocking member being movable parallel with the said'tracks.

11. A hoisting cage comprising a car dump rotatably movable by gravity to dump a car, tracks carried by the said dump and a locking member for holding the said dump against rotation for loading, the said locking member being movable parallel with the said tracks and in the plane thereof.

' 12. A hoisting cage comprising a car dump rotatablymovable by gravity to dump a car, tracks carried by the said dump, and

'locking means associated with the said tracksfor holding the said dump against rotation while receiving a loaded car.

13. A hoisting cage comprising a frame, a car dump carried by said frame, a -chute carried 'by said frame and movable, independently of said dump, into positionto deliver materlal from th said dump to a stationary receiving hopper, and means for permitting the said chute to rest upon the sa'id ho pper the cage overwinds beyond its normal deliver ng position.

14-. A hoisting cage comprising a rotatable car dump, an operating member adaptedto engage a stationary guide dispo sedadiacent to the path of movement of said cage. and a flexible connection between the said dump and the said operating mem ber.

15. A hoisting cage comprising a car dump, a ino'vablechute adapted to deliver material from the said dump to a stationary receiving-hopper, and flexible means for connccting the, said chute to the said dump.

.16. A hoisting cage comprlsmg a 'car dump, a pivotally movable chute adapted to deliver material from the said dump to a stationary receiving hopper, and one or more flexible connectors connecting the said chute to the saiddump, the said connectors ha ing sufficient slack to permit the said chute to :rest upon the said hopper if the cageoverwinds beyond its normal delivering position. 17. A hoisting cage comprising a rotatably movable car dump, a chute adapted to receive material from said dump, means for rotating the said dump by gravity to discharge its lead, and means "associated with said chute :for'positively returning the said dump toward its upright position.

18. A hoisting cage comprising a rotatably movable car dump, a chute adapted to receive material from'said dump, means for rotating the'said dump by gravity to discharge its-load, and means associated with said chute for positively engaging the said dump and giving it a reverse rotation .toward its upright position.

19. A hoisting cage comprising a rotatably movable car dump, a chute adapted carried by the'said cage, beneath said dump,

means for raising and lowering the said chute while said frame is descending and rising, and means carried by the said chute for engaging and moving the said dump while the said frame is descending from its delivering position and while the said chute is rising,"whereby the said dump is given a positive rotation toward its upright position. i V

21. A hoisting cage comprising a rota-* tably movable car dump, a chute for receivmg material from the said dump, and means for closingthe end of the cage adjacent to said chute while said dump is moving to dump a car, the said means comprising a plate carried adjacent to the path of movement of the cage and means carried by the cage for engaging the said plate during the upward movement of the cage and for carrying said plate with the cage during its fi1rther upward movement;

22. 'A. hoisting" cage comprising a vertically movable frame, a rotat'ably movable car dum carried by said frame, a chute earned by said frame and adapted "to re 1,467,223 j r i F5.

ceive material from said dump, a support In testimony whereof; I, the said VERNOR mounted adjacent to the path of movement T. BARKLEY,'hfLVB hBIQHIItO'S61?my'hmfld." of said frame near the upper part of its p h travel, and a plate slidably mounted on said VERNOR E v uppo t and adapted to be engaged and Witness lifted by said frame and toi cl'ose the'open R. D. BROWN, end of said frame adj acent-te: said chute. JOHN F. VVJLL. 

